That strap could almost be a US one.
Indeed the dimensions are the same. The first generation of wallbox type fittings which appeared in Australasia post WW2 were based on US design. Even the screw pitch is the same, which means local BA, metric or Whitworth sizes don't fit. American wall sockets and switches do in fact fit our wallboxes or mounting blocks without any modification. For the last 40 odd years or so, the fittings have been one piece; ie. the wall plate is an integral part of the socket or switch and not two separate items as is still done in the US. The separate fittings and wallplates are still available for replacement purposes as shown here:
http://updates.clipsal.com/ClipsalO...t=30&skip=6&code=108&level=3This is a double gang wallplate for switch and socket.
Light socket mounting dimensions are completely different.
